Table 2.

Interrupted Time-Series Analysis of Proportion of Adult ED Patients Discharged with an Opioid Prescription

Full Segmented Regression Model	Coefficient	t-statistic	P-value	95% Confidence Interval
Intercept (β0)	0.146	44.2	<0.0001	0.139	0.153
Baseline trend (β1)	−0.0028	−8.02	<0.0001	−0.0035	−0.002
Level change after PDMP (β2)	−0.0156	−5.41	<0.0001	−0.022	−0.01
Trend change after PDMP (β3)	−0.0011	−2.36	0.03	−0.002	−0.0001
Post-treatment linear trend	−0.004	−12.8	<0.0001	−0.005	−0.003